Not recognised by BirdLife International. Considered by some authors to be a subspecies of Tropical Gnatcatcher (Polioptila plumbea). References See References. Files: More Information Articles about the White-browed Gnatcatcher If you would like to read any articles about the White-browed Gnatcatcher... Show Articles (0) No Pictures of White-browed Gnatcatcher If Birdpedia has no pictures of White-browed Gnatcatcher or you would like to see more, then try the following... From BING (3) No Videos of White-browed Gnatcatcher If Birdpedia has no videos of White-browed Gnatcatcher or you would like to see more, then try the following.. From BING (0)